<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width,initial-scale=1.0">
    <title>山东师范大学信息科学与工程学院实验室管理系统</title>
    <link rel="icon" type="image/x-icon" href="static/index.png" />
  </head>
  <body>
    <div id="app"></div>
    <!-- built files will be auto injected -->
  </body>
  <script src="//unpkg.com/vue/dist/vue.js"></script>
<script src="//unpkg.com/element-ui@2.15.6/lib/index.js"></script>
<div id="app">
<template>
  <div>
    <el-button @click="show3 = !show3">Click Me</el-button>

    <div style="margin-top: 20px; height: 200px;">
      <el-collapse-transition>
        <div v-show="show3">
          <div class="transition-box">el-collapse-transition</div>
          <div class="transition-box">el-collapse-transition</div>
        </div>
      </el-collapse-transition>
    </div>
  </div>
</template>
</div>
</html>
